This is the easiest part of the exposure triangle to explain, and probably the easiest to understand, too. Shutter Speed Freeze action with high shutter speeds – by Aaron Grubb The closer you are, the less there is in focus. Your distance from your subject affects your depth of field, as well. “Longer” lenses (lenses that have a longer focal length) will blur more of the background. Focal length also affects depth of field, though. This is achieved by using a lens that has a wide aperture. This is seen often in portraits: the person is in focus and much of the scene is out of focus. This simply means that less of your image is in focus. Below are two images taken on a 35mm lens one at f1.4 and one at f10. Not only that, but when you have your aperture at a wider setting, your images will be noticeably different, due to the depth of field (also written as DOF) being “shallower”. When I had my first encounter with the inexpensive 50mm f1.8 lens, I was shocked at how much better it was in low light. I didn’t have a flash besides my pop-up flash and I didn’t like how the images looked when I used it. At f3.5, I found that my camera wasn’t able to take decent pictures indoors without a flash. For example, my first lens (a kit lens), had an aperture range of f3.5 to f32. Why does the aperture of your lens matter? Well, different lenses have different f-number ranges. An important fact to note is that the smaller the “f-number”, the wider the aperture, so f1.4 is very wide and f16 is very small. ![]() Usually, your camera’s dials controlling aperture, shutter speed, and ISO are set to be adjusted in ⅓ stop increments, so three “clicks” in a given direction will equal one stop. The amount of light it lets in is measured in “ f-stops ”, so if you hear someone say something about a lens letting in two stops more of light, just know that it’s a mathematical measurement of light. It’s a concept that you need to know, but it doesn’t make a lot of sense if you don’t understand the individual parts: Aperture, shutter speed, and ISO.Īn aperture is a mechanical iris, similar to the one in your eye, that opens to let in more light or closes to limit the light entering the lens. If you try to find instructions on Google, you’ll almost definitely come across the “exposure triangle”. When you first decide to shoot in manual mode, it might seem daunting. I have you covered! I’ve put many of the terms I’m using in bold so they’re easy to spot! A simple conversation with another photographer can make you feel ignorant when you don’t know the lingo, but have no fear. When you start getting into a vast subject like photography, you might find yourself overwhelmed with terminology that you don’t understand.
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